rainbow tail

--https://github.com/Mokiros/roblox-FE-compatibility
if game:GetService("RunService"):IsClient() then error("Script must be server-side in order to work; use h/ and not hl/") end
local Player,game,owner = owner,game
local RealPlayer = Player
do print("FE Compatibility code V2 by Mokiros")local RealPlayer=RealPlayer;script.Parent=RealPlayer.Character;local a=function(b)b[1].f[b[2]]=nil end;local c={__index={disconnect=a,Disconnect=a}}local d={__index={Connect=function(b,e)local f=tostring(math.random(0,10000))while b.f[f]do f=tostring(math.random(0,10000))end;b.f[f]=e;return setmetatable({b,f},c)end}}d.__index.connect=d.__index.Connect;local function g()return setmetatable({f={}},d)end;local h={Hit=CFrame.new(),KeyUp=g(),KeyDown=g(),Button1Up=g(),Button1Down=g(),Button2Up=g(),Button2Down=g()}h.keyUp=h.KeyUp;h.keyDown=h.KeyDown;local i={InputBegan=g(),InputEnded=g()}local CAS={Actions={},BindAction=function(self,j,k,l,...)CAS.Actions[j]=k and{Name=j,Function=k,Keys={...}}or nil end}CAS.UnbindAction=CAS.BindAction;local function m(self,n,...)for o,e in pairs(self[n].f)do e(...)end end;h.T=m;i.T=m;local p=Instance.new("RemoteEvent")p.Name="UserInput_Event"p.OnServerEvent:Connect(function(q,r)if q~=RealPlayer then return end;h.Target=r.e;h.Hit=r.d;if not r.f then local s=r.c==Enum.UserInputState.Begin;if r.b==Enum.UserInputType.MouseButton1 then return h:T(s and"Button1Down"or"Button1Up")end;if r.b==Enum.UserInputType.MouseButton2 then return h:T(s and"Button2Down"or"Button2Up")end;for o,t in pairs(CAS.Actions)do for o,u in pairs(t.Keys)do if u==r.a then t.Function(t.Name,r.c,r)end end end;h:T(s and"KeyDown"or"KeyUp",r.a.Name:lower())i:T(s and"InputBegan"or"InputEnded",r,false)end end)p.Parent=NLS([==[local a=script:WaitForChild("UserInput_Event")local b=owner:GetMouse()local c=game:GetService("UserInputService")local d=function(e,f)if f then return end;a:FireServer({a=e.KeyCode,b=e.UserInputType,c=e.UserInputState,d=b.Hit,e=b.Target})end;c.InputBegan:Connect(d)c.InputEnded:Connect(d)local g,h;local i=game:GetService("RunService").Heartbeat;while true do if g~=b.Hit or h~=b.Target then g,h=b.Hit,b.Target;a:FireServer({f=1,Target=h,d=g})end;for j=1,2 do i:Wait()end end]==],script)local v=game;local w={__index=function(self,u)local x=rawget(self,"_RealService")if x then return typeof(x[u])=="function"and function(o,...)return x[u](x,...)end or x[u]end end,__newindex=function(self,u,y)local x=rawget(self,"_RealService")if x then x[u]=y end end}local function z(t,A)t._RealService=typeof(A)=="string"and v:GetService(A)or A;return setmetatable(t,w)end;local B={GetService=function(self,x)return rawget(self,x)or v:GetService(x)end,Players=z({LocalPlayer=z({GetMouse=function(self)return h end},Player)},"Players"),UserInputService=z(i,"UserInputService"),ContextActionService=z(CAS,"ContextActionService"),RunService=z({_btrs={},RenderStepped=v:GetService("RunService").Heartbeat,BindToRenderStep=function(self,j,o,k)self._btrs[j]=self.Heartbeat:Connect(k)end,UnbindFromRenderStep=function(self,j)self._btrs[j]:Disconnect()end},"RunService")}rawset(B.Players,"localPlayer",B.Players.LocalPlayer)B.service=B.GetService;z(B,game)game,owner=B,B.Players.LocalPlayer end



local pl = game.Players.LocalPlayer
local ch = pl.Character
local tb = {}

local seg = 80

local a = Instance.new("Part", script)
a.CanCollide = false
a.Size = Vector3.new()
a.Material = "Neon"
local w = Instance.new("Weld",a)
w.Part0 = ch.HumanoidRootPart
w.Part1 = a
w.C0 = CFrame.new(0,-1,.5)

local p = Instance.new("Part", script)
p.Material = "Neon"
p.Anchored = true
p.CanCollide = false
p.Size = Vector3.new()
table.insert(tb,p)

for i = 1,seg-1 do
 local p = p:clone()
 p.Parent = script
 table.insert(tb,p)
end

getRainbowRGB = function (tick)
 local section, secondary do
  section = tick % 1 * 3
  secondary = .5 * math.pi * (section % 1)
  if (section < 1) then
   return Color3.new (1, 1 - math.cos (secondary), 1 - math.sin (secondary))
  elseif (section < 2) then
   return Color3.new (1 - math.sin(secondary), 1, 1 - math.cos(secondary))
  else
   return Color3.new (1 - math.cos(secondary), 1 - math.sin(secondary), 1)
  end
 end
end

t = 0
while true do
 t = t + game:service"RunService".RenderStepped:wait()
 for i = 0,#tb-1 do
   local p1,p2 = tb[i],tb[i+1]
   if i==0 then p1 = a end
   local x = p1.Position.x - p2.Position.x
   local y = p1.Position.y - p2.Position.y
   local z = p1.Position.z - p2.Position.z
   local dist = math.sqrt(x^2+y^2+z^2)
   local diff = (p1.Size.z/(1/3) - dist)/dist
   x = x*.5*diff
   y = y*.5*diff
   z = z*.5*diff
   p2.Position = p2.Position - Vector3.new(x,y,z)
   p2.CFrame = CFrame.new((p1.Position+p2.Position)/2,p1.Position)
   p2.Color = getRainbowRGB(t + i/10)
   p1.Color = getRainbowRGB(t + i/10)
 end
end